Fumonisins are a group of harmful fungal metabolites mainly produced by Fusarium proliferatum and F. verticillioides and which, when present in feed, can have a serious impact on the performance of poultry flocks.

Mycotoxins are naturally occurring, toxic compounds, produced by fungi that infects agricultural crops, particularly cereals and oilseeds. Infection can occur during the growth and storage of crops, but also later on in processed foods and feeds.